Look for a stamping on the housing with either AFV or AXZ. Those are the codes for the two different torsen rear differentials used on the V8. I think it's on the bottom, but can't be sure, so look all over. Either one is fine.
bob
-------------- Original message ----------------------
From: "Douglas Fifield" <douglas.fifield at gmail.com>
> All,
>> Have a spare differential that is supposed to be off of a V8. Before
> I try to replace the seals, fluid, etc and attempt a swap in the S6, I
> want to verify that it is a V8 diff. Can anyone tell me how to do
> that?
>> Is there a P/N stamped on the case or some other identifying characteristics?
>> TIA,
>> Douglas